Rest the toe and avoid activities that caused the injury
Ice the toe for 15 to 20 minutes at a time, several times a day
Elevate the foot to reduce swelling
Wear roomy shoes or sandals to avoid pressure on the nail
Keep the nail clean and dry
Trim the nail carefully as it grows out
Do not try to remove the nail yourself
Use over-the-counter pain relief if needed and safe for you
Seek medical care if there is severe pain, swelling, pus, fever, or a bad smell
Seek medical care if the black color appeared without injury
Seek medical care if the dark area does not grow out with the nail
Seek medical care if the nail becomes thick, deformed, or lifts off
Seek medical care if you have diabetes, poor circulation, or a weakened immune system
See a podiatrist or doctor if the discoloration keeps coming back
Protect your feet with proper-fitting shoes and toenail care to prevent future black toenails